IS 241 exam 2 practice (1/3) Exam Questions and Answers Latest Verified

A sample that does not provide a good representation of the population from which it was collected is referred to as a(n)sample. - CORRECT ANSWER-Biased At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of I centimeter and a standard deviation of 0.1 centimeters. A random sample of 12 computer chips is taken. What is the probability that the sample mean will be between 0.99 and I .01 centimeters? - CORRECT ANSWER-0.2710 For air travelers, one of the biggest complaints involves the waiting time between when the airplane taxis away from the terminal until the flight takes off. This waiting time is known to have a skewed-right distribution with a mean of 10 minutes and a standard deviation of 8 minutes. Suppose 100 flights have been randomly sampled. Describe the sampling distribution of the mean waiting time between when the airplane taxis away from the terminal until the flight takes off for these 100 flights. - CORRECT ANSWERDistribution is approximately normal with mean = 10 minutes and standard error = 0.8 minutes. Major league baseball salaries averaged $1.5 million with a standard deviation of $0.8 million in 1994. Suppose a sample of 100 major league players was taken. Find the approximate probability that the average salary of the 100 players exceeded $1 million. - CORRECT ANSWER-Approximately 1 Sampling distributions describe the distribution of - CORRECT ANSWER-statistics Suppose a sample of n = 50 items is drawn from a population of manufactured products and the weight, X, of each item is recorded. Prior experience has shown that the weight has a probability distribution with p = 6 ounces and o = 2.5 ounces. Which of the following is true about the sampling distribution of the sample mean if a sample of size 15 is selected? - CORRECT ANSWER-The mean of the sampling distribution is 6 ounces. Suppose the ages of students in Statistics 101 follow a skewed-right distribution with a mean of 23 years and a standard deviation of 3 years. If we randomly sampled 100 students, which of the following statements about the sampling distribution of the sample mean age